|#|Name|Alma mater|Birth date|Marriage date|President|Tenure|Tenure|
|---|---|---|---|---|---|---|---|
|1|Jiang Qing|Shandong Provincial Experimental Theatre|19 March 1914|20 November 1938|Mao Zedong|27 September 1954|27 April 1959|
|2|Wang Guangmei|Fu Jen Catholic University|26 September 1921|21 August 1948|Liu Shaoqi|27 April 1959|21 October 1968|
|3|He Lianying|N/A|N/A|N/A|Dong Biwu|31 October 1968|17 January 1975|
|4|Lin Jiamei|Tong De Medical College|1924|N/A|Li Xiannian|18 June 1983|8 April 1988|
|5|Wang Yeping|Shanghai Foreign Language Institute|February 1928|December 1949|Jiang Zemin|27 March 1993|15 March 2003|
|6|Liu Yongqing|Tsinghua University|1940|February 1970|Hu Jintao|15 March 2003|14 March 2013|
|7|Peng Liyuan|China Conservatory of Music|20 November 1962|1 September 1987|Xi Jinping|14 March 2013|Incumbent|

Question: what is the number of marriages on the chart
Answer: 5